A pulsating pressure differential transmitter

Abstract

The present invention relates to a pulsating differential pressure transmitter, belonging to the field of sensor technology, including a transmitter body, at least one mounting groove is provided on the transmitter body, a mounting through hole is provided at the bottom of the mounting groove, a gasket, a piezoelectric crystal, a disc spring and a corrugated surface stopper are provided in sequence in the mounting groove, the gasket is arranged at the bottom of the mounting groove, the corrugated surface stopper is provided with a through hole that passes through from top to bottom, a diaphragm is clamped on the corrugated surface stopper, an electrode is provided in the mounting through hole, the electrode is connected to the piezoelectric crystal, an oil inlet is provided on the side wall of the transmitter body, the oil inlet is connected to the inside of the mounting groove, and a plugging assembly is detachably provided in the oil inlet. The pressure transmitter of the present application is provided with a gasket, a piezoelectric crystal, a disc spring, a corrugated surface stopper and a diaphragm in sequence in the mounting groove, and pressure oil is injected into the transmitter body. After the diaphragm is pressurized, the piezoelectric crystal generates an electric charge that is transmitted through the electrode to form a graphic for display. The structure is simple and the accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of sensors, and in particular to a pulsating differential pressure transmitter. Background Art

[0002] Pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. It can convert physical pressure parameters such as gas and liquid sensed by the pressure measuring element sensor into standard electrical signals to supply secondary instruments such as indicator alarms, recorders, regulators, etc. for measurement, indication and process regulation.

[0003] At present, traditional pressure transmitters have the following disadvantages: 1. Narrow application range; 2. Low measurement accuracy, large error and unstable working state; In order to solve the above technical problems, a new technical solution is proposed. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pulsating differential pressure transmitter to solve the problems raised in the background technology.

[0005] In order to achieve the above-mentioned invention objectives, the present invention provides a pulsating pressure differential transmitter, including a transmitter body, at least one mounting groove is provided on the transmitter body, a mounting through hole is provided at the bottom of the mounting groove, a gasket, a piezoelectric crystal, a disc spring and a corrugated surface stopper are provided in sequence in the mounting groove, the gasket is arranged at the bottom of the mounting groove, the corrugated surface stopper is provided with a through hole that passes through from top to bottom, a diaphragm is clamped on the corrugated surface stopper, an electrode is provided in the mounting through hole, the electrode is connected to the piezoelectric crystal, an oil inlet hole is provided on the side wall of the transmitter body, the oil inlet hole is connected to the inside of the mounting groove, and a plugging hole assembly is detachably provided in the oil inlet hole.

[0006] Furthermore, the hole blocking assembly includes a blocking screw head and a blocking ball, the blocking screw head is threadedly connected to the oil inlet hole, and the bottom of the oil inlet hole is provided with a funnel-shaped inclined surface that cooperates with the blocking ball.

[0007] Furthermore, the electrode includes an electrode rod and an electrode sheet connected to the electrode rod, an insulating capillary is provided in the mounting through hole, the electrode rod passes through the insulating capillary, and the electrode sheet is arranged between the gasket and the piezoelectric crystal.

[0008] Furthermore, the corrugated surface stopper includes two symmetrically arranged half protrusions, a through groove is provided between the two half protrusions, and the two half protrusions are symmetrically arranged about the through groove.

[0009] Furthermore, the transmitter body is provided with a plurality of mounting holes.

[0010] Furthermore, a circular groove is provided on one side of the transmitter body away from the mounting groove, a groove is provided at the bottom of the circular groove, and the groove is communicated with the mounting through hole.

[0011] Furthermore, the piezoelectric crystal is arranged in a positioning ring, and the positioning ring is arranged in the mounting groove.

[0012] Furthermore, the gasket is a polyimide gasket, and the size of the gasket is the same as the size of the outer ring of the positioning ring.

[0013] Furthermore, the edge of the diaphragm is provided with a circular chamfer, and the corrugated surface stop end is provided with a mounting protrusion that matches the circular chamfer.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The pressure transmitter of the present application has a gasket, a piezoelectric crystal, a disc spring, a corrugated surface stopper and a diaphragm arranged in sequence in the installation groove, and pressurized oil is injected into the transmitter body. After the diaphragm is pressurized, the piezoelectric crystal generates an electric charge which is transmitted through the electrode to form a graphic for display. The structure is simple and the accuracy is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0017] Figure 2 is a schematic cross-sectional structural diagram of an embodiment of the present invention;

[0018] Figure 3 for Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0019] Figure 4 It is a schematic diagram of the structure of the transmitter body according to an embodiment of the present invention;

[0020] Figure 5 It is an enlarged structural schematic diagram of the corrugated surface stop end according to an embodiment of the present invention;

[0021] Figure 6 is an enlarged structural schematic diagram of a diaphragm according to an embodiment of the present invention;

[0022] Figure 7 is another cross-sectional structural schematic diagram of an embodiment of the present invention;

[0023] Figure 8 for Figure 7 A schematic diagram of the enlarged structure of B;

[0024] Fig. 9 It is a schematic diagram of the enlarged structure of the electrode according to an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the invention, rather than all the embodiments. The embodiments of the present invention are described below in conjunction with the drawings.

[0026] refer to Figures 1 to 9 A pulsating differential pressure transmitter includes a transmitter body 1, at least one mounting groove 3 is provided on the transmitter body 1, a mounting through hole 4 is provided at the bottom of the mounting groove 3, a gasket 10, a piezoelectric crystal 11, a disc spring 13 and a corrugated surface stopper 15 are sequentially provided in the mounting groove 3, the gasket 10 is arranged at the bottom of the mounting groove 3, a through hole 21 penetrating from top to bottom is provided on the corrugated surface stopper 15, a diaphragm 16 is clamped on the corrugated surface stopper 15, an electrode 8 is provided in the mounting through hole 4, the electrode 8 is connected to the piezoelectric crystal 11, an oil inlet hole 9 is provided on the side wall of the transmitter body 1, the oil inlet hole 9 is connected to the inside of the mounting groove 3, and a plugging component is detachably provided in the oil inlet hole 9;

[0027] Two mounting grooves 3 can also be provided, and all corresponding parts are provided in duplicate. Whether to provide them is selected according to needs. The side wall of the mounting groove 3 is provided in a step form to fix the compression amount, so as to reduce the range of force applied to the piezoelectric crystal and improve the accuracy.

[0028] When in use, first install the gasket 10, piezoelectric crystal 11, disc spring 13 and corrugated surface stopper 15 in the installation groove 3 in sequence. After the installation is completed, fill the sealing resin glue in the groove 6 to prevent leakage, fix the transmitter body 1, evacuate the inside of the transmitter body 1 through the oil inlet hole 9, and then inject special oil into it, and then block the oil inlet hole 9 through the blocking screw head 22 and the blocking ball 23. At this time, the inside of the transmitter body 1 is in a closed state. When the diaphragm 16 is squeezed, the pressure will be transmitted to the piezoelectric crystal 11 along with the oil, causing the piezoelectric crystal 11 to generate an electric charge, which is then conducted through the electrode 8 to form a ladder diagram for display;

[0029] The plugging hole assembly includes a plugging screw head 22 and a plugging ball 23. The plugging screw head 22 is threadedly connected to the oil inlet hole 9. The bottom of the oil inlet hole 9 is provided with a funnel-shaped inclined surface that matches the plugging ball 23. The plugging screw head 22 is provided with a hexagonal hole to facilitate installation and removal of the plugging screw head 22. The bottom of the oil inlet hole 9 is provided with a funnel-shaped inclined surface that matches the plugging ball 23. During installation, the plugging screw head 22 gives thrust to the plugging ball 23, and the plugging ball 23 fits tightly against the funnel-shaped inclined surface to complete the plugging.

[0030] The electrode 8 includes an electrode rod 20 and an electrode sheet 19 connected to the electrode rod 20. An insulating capillary 7 is provided in the mounting through hole 4. The electrode rod 20 passes through the insulating capillary 7. The electrode sheet 19 is provided between the gasket 10 and the piezoelectric crystal 11. By providing the electrode sheet 19, its area is larger than that of the electrode rod 10, so that the signal can be better collected.

[0031] The corrugated surface stopper 15 includes two symmetrically arranged half protrusions 14, a through groove 18 is arranged between the two half protrusions 14, and the two half protrusions 14 are symmetrically arranged about the through groove 18. The two half protrusions 14 are used to position the disc spring 13, and the inner ring of the disc spring 13 is installed in conjunction with the outer rings of the two half protrusions 14. The through hole 21 is connected to the through groove 18. The arrangement of the two half protrusions 14 cooperates with the installation of the disc spring 13 to fix the center and ensure that the disc spring 13 is within the movable range. In addition, when the pressure passes through, the piezoelectric crystal 11 is evenly compressed;

[0032] The transmitter body 1 is provided with a plurality of mounting holes 2 for mounting the transmitter body 1 on a device that needs to perform pressure measurement;

[0033] A circular groove 5 is provided on one side of the transmitter body 1 away from the installation groove 3, and a groove 6 is provided at the bottom of the circular groove 5. The groove 6 is connected to the installation through hole 4. After the installation is completed, the circular groove 5 and the groove 6 are sealed with glue.

[0034] The piezoelectric crystal 11 is arranged in the positioning ring 12, and the positioning ring 12 is arranged in the mounting groove 3. The positioning ring 12 is arranged to position the piezoelectric crystal 11;

[0035] The gasket 10 is a polyimide gasket, and the size of the gasket 10 is the same as the outer ring size of the positioning ring 12;

[0036] The edge of the diaphragm 16 is provided with a circular chamfer 17, and the corrugated surface stop end 15 is provided with a mounting protrusion that matches the circular chamfer 17. The diaphragm 16 is mounted on the corrugated surface stop end 15 by providing the circular chamfer 17;

[0037] By sequentially arranging a gasket 10, a piezoelectric crystal 11, a disc spring 13, a corrugated surface stop end 15 and a diaphragm 16 in the mounting groove 3, and injecting pressurized oil into the transmitter body 1, after the diaphragm 16 is pressurized, the piezoelectric crystal 11 generates an electric charge which is transmitted through the electrode to form a graphic for display, with a simple structure and high precision.

[0038] The technical solution of the present invention is described above in conjunction with specific implementation methods, but it should be noted that the above descriptions are only for explaining the solution of the present invention and cannot be interpreted in any way as a specific limitation on the scope of protection of the invention. Based on the explanation here, those skilled in the art can think of other specific implementation methods or equivalent replacements of the present invention without creative work, and they will all fall within the scope of protection of the present invention.

Claims

1. A pulsating pressure differential transmitter, characterized in that: The invention comprises a transmitter body (1), wherein at least one mounting groove (3) is provided on the transmitter body (1), a mounting through hole (4) is provided at the bottom of the mounting groove (3), a gasket (10), a piezoelectric crystal (11), a disc spring (13) and a corrugated surface stopper (15) are provided in sequence in the mounting groove (3), the gasket (10) is arranged at the bottom of the mounting groove (3), the corrugated surface stopper (15) is provided with a through hole (21) which passes through from top to bottom, a diaphragm (16) is clamped on the corrugated surface stopper (15), an electrode (8) is provided in the mounting through hole (4), the electrode (8) is connected to the piezoelectric crystal (11), an oil inlet hole (9) is provided on the side wall of the transmitter body (1), the oil inlet hole (9) is connected to the inside of the mounting groove (3), and a detachable plugging assembly is provided in the oil inlet hole (9).

2. A pulsating differential pressure transmitter according to claim 1, characterized in that: The plugging hole assembly comprises a plugging screw head (22) and a plugging ball (23); the plugging screw head (22) is threadedly connected to the oil inlet hole (9); and the bottom of the oil inlet hole (9) is provided with a funnel-shaped inclined surface that cooperates with the plugging ball (23).

3. The pulsating differential pressure transmitter according to claim 1, characterized in that: The electrode (8) comprises an electrode rod (20) and an electrode sheet (19) connected to the electrode rod (20); an insulating capillary (7) is provided in the mounting through hole (4); the electrode rod (20) passes through the insulating capillary (7); and the electrode sheet (19) is arranged between the gasket (10) and the piezoelectric crystal (11).

4. The pulsating differential pressure transmitter according to claim 1, characterized in that: The corrugated surface stopper (15) comprises two symmetrically arranged half protrusions (14), a through slot (18) is provided between the two half protrusions (14), and the two half protrusions (14) are symmetrically arranged with respect to the through slot (18).

5. The pulsating differential pressure transmitter according to claim 1, characterized in that: The transmitter body (1) is provided with a plurality of mounting holes (2).

6. The pulsating differential pressure transmitter according to claim 1, characterized in that: A circular groove (5) is provided on one side of the transmitter body (1) away from the mounting groove (3), a groove (6) is provided at the bottom of the circular groove (5), and the groove (6) is communicated with the mounting through hole (4).

7. The pulsating differential pressure transmitter according to claim 1, characterized in that: The piezoelectric crystal (11) is arranged in a positioning ring (12), and the positioning ring (12) is arranged in the mounting groove (3).

8. The pulsating differential pressure transmitter according to claim 7, characterized in that: The gasket (10) is a polyimide gasket, and the size of the gasket (10) is the same as the size of the outer ring of the positioning ring (12).

9. The pulsating differential pressure transmitter according to claim 1, characterized in that: The edge of the diaphragm (16) is provided with a circular chamfer (17), and the corrugated surface stop end (15) is provided with a mounting protrusion that matches the circular chamfer (17).

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